pinctrl/rockchip: add rk3588 support

Add pinctrl support for RK3588.

[merged in downstream fixes, simplified register lookup logic for better
maintanence at the cost of a bit more static const memory and fixed some
incorrect registers]

Signed-off-by: Jianqun Xu <jay.xu@rock-chips.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20220422170920.401914-14-sebastian.reichel@collabora.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>